A very good chance its leaking [intercooler] being in a 2003 model also the rear hose has a tendency
to pop off. High EGTs are from too much fuel and low boost. I reckon you go get a tigged intercooler
and set the dawes to 10psi at 100KPH and your problem will be solved , also fit a catch can.
Another reason could be a dirty maf, grab some MAF cleaner and give it a good spray dont
touch with your fingers. While you clean the MAF disconnect to battery while you do it as well
Check all those small vacuum hoses as well
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